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CalleePreservedParam bug fix #632

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CalleePreservedParam bug fix #632

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14 changes: 6 additions & 8 deletions src/main/scala/ir/transforms/CalleePreservedParam.scala
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Original file line number Diff line number Diff line change
Expand Up @@ -9,19 +9,17 @@ object CalleePreservedParam {
var counter = util.Counter()

/**
* Asusming single-return and parameter form
* Assuming single-return and parameter form
*/

val preserved = (19 to 29).map(i => s"R$i").toSet // required by ABI
val callReturnStackPreserved = Set("R30", "R31") // not strictly required
private val preserved = (19 to 29).map(i => s"R$i").toSet // required by ABI
private val callReturnStackPreserved = Set("R30", "R31") // not strictly required

def isPreservedParam(v: LocalVar) = {
private def isPreservedParam(v: LocalVar) = {
// abi assumption
v.varName match {
case s"${reg}_in" => callReturnStackPreserved.contains(reg)
case s"${reg}_out" => callReturnStackPreserved.contains(reg)
case s"${reg}_in" => preserved.contains(reg)
case s"${reg}_out" => preserved.contains(reg)
case s"${reg}_in" => callReturnStackPreserved.contains(reg) || preserved.contains(reg)
case s"${reg}_out" => callReturnStackPreserved.contains(reg) || preserved.contains(reg)
case _ => false
}
}
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